Compilare: user.cpp: In function ‘void df(int)’: user.cpp:46: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘int main()’: user.cpp:58: warning: format ‘%s’ expects type ‘char*’, but argument 2 has type ‘char (*)[1001]’ user.cpp:83: warning: format ‘%d’ expects type ‘int’, but argument 2 has type ‘long long unsigned int’ user.cpp:52: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:53: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:55: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:58: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result